企业邮箱绑定域名，查看有没有生效最直接的方法
Microsoft Windows [版本 5.2.3790]
(C) 版权所有 1985-2003 Microsoft Corp.C:\Documents and Settings\Administrator>nslookup //这里输入NSLOOKUP
Default Server: ns1.szgwbn.net //这里是你自己本地的信息
Address: 211.162.78.1
> set type=mx //查MX记录的命令
> szwofeng.com //输入你要查的网址
Server: ns1.szgwbn.net
Address: 211.162.78.1
Non-authoritative answer:
szwofeng.com MX preference = 10, mail exchanger = mx59.dns.com.cn //这里就是MX记录了，我这里有两条
szwofeng.com MX preference = 0, mail exchanger = smtp.secureserver.net
szwofeng.com nameserver = ns27.domaincontrol.com
szwofeng.com nameserver = ns28.domaincontrol.com
smtp.secureserver.net internet address = 216.69.186.201
mx59.dns.com.cn internet address = 211.100.21.181
ns27.domaincontrol.com internet address = 216.69.185.14
ns27.domaincontrol.com AAAA IPv6 address = 2607:f208:206::e
ns28.domaincontrol.com internet address = 208.109.255.14
ns28.domaincontrol.com AAAA IPv6 address = 2607:f208:302::e
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